358 lines
7.8 KiB
JavaScript
358 lines
7.8 KiB
JavaScript
module.exports = grammar({
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name: 'dockerfile',
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extras: $ => [$.comment, /\s+/, '\\\n'],
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rules: {
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source_file: $ => repeat(seq($._instruction, "\n")),
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_instruction: $ => choice(
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$.from_instruction,
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$.run_instruction,
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$.cmd_instruction,
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$.label_instruction,
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$.expose_instruction,
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$.env_instruction,
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$.add_instruction,
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$.copy_instruction,
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$.entrypoint_instruction,
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$.volume_instruction,
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$.user_instruction,
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$.workdir_instruction,
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$.arg_instruction,
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$.onbuild_instruction,
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$.stopsignal_instruction,
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$.healthcheck_instruction,
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$.shell_instruction,
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$.maintainer_instruction,
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),
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from_instruction: $ => seq(
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alias(/[fF][rR][oO][mM]/, "FROM"),
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$._non_newline_whitespace,
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optional($.param),
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$.image_spec,
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optional(seq(
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alias(/[aA][sS]/, "AS"),
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field("as", $.image_alias),
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)),
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),
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run_instruction: $ => seq(
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alias(/[rR][uU][nN]/, "RUN"),
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$._non_newline_whitespace,
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choice(
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$.string_array,
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$.shell_command,
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),
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),
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cmd_instruction: $ => seq(
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alias(/[cC][mM][dD]/, "CMD"),
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$._non_newline_whitespace,
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choice(
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$.string_array,
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$.shell_command,
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),
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),
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label_instruction: $ => seq(
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alias(/[lL][aA][bB][eE][lL]/, "LABEL"),
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$._non_newline_whitespace,
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repeat1($.label_pair),
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),
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expose_instruction: $ => seq(
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alias(/[eE][xX][pP][oO][sS][eE]/, "EXPOSE"),
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$._non_newline_whitespace,
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repeat1($.expose_port),
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),
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env_instruction: $ => seq(
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alias(/[eE][nN][vV]/, "ENV"),
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$._non_newline_whitespace,
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choice(
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repeat1($.env_pair),
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alias($._spaced_env_pair, $.env_pair),
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)
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),
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add_instruction: $ => seq(
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alias(/[aA][dD][dD]/, "ADD"),
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$._non_newline_whitespace,
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optional($.param),
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$.path,
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$._non_newline_whitespace,
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$.path,
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),
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copy_instruction: $ => seq(
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alias(/[cC][oO][pP][yY]/, "COPY"),
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$._non_newline_whitespace,
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optional($.param),
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$.path,
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$._non_newline_whitespace,
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$.path,
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),
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entrypoint_instruction: $ => seq(
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alias(/[eE][nN][tT][rR][yY][pP][oO][iI][nN][tT]/, "ENTRYPOINT"),
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$._non_newline_whitespace,
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choice(
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$.string_array,
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$.shell_command,
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),
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),
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volume_instruction: $ => seq(
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alias(/[vV][oO][lL][uU][mM][eE]/, "VOLUME"),
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$._non_newline_whitespace,
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choice(
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$.string_array,
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seq(
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$.path,
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repeat(seq($._non_newline_whitespace, $.path)),
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),
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),
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),
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user_instruction: $ => seq(
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alias(/[uU][sS][eE][rR]/, "USER"),
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$._non_newline_whitespace,
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field("user", alias($._user_name_group, $.unquoted_string)),
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optional(seq(
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token.immediate(":"),
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field("group", alias($._user_name_group, $.unquoted_string)),
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)),
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),
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_user_name_group: $ => repeat1(choice(
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token.immediate(/[a-z][-a-z0-9_]*/),
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$.expansion,
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)),
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workdir_instruction: $ => seq(
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alias(/[wW][oO][rR][kK][dD][iI][rR]/, "WORKDIR"),
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$._non_newline_whitespace,
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$.path,
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),
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arg_instruction: $ => seq(
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alias(/[aA][rR][gG]/, "ARG"),
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$._non_newline_whitespace,
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field("name", alias(/[a-zA-Z0-9_]+/, $.unquoted_string)),
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optional(seq(
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token.immediate("="),
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field("default", choice(
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$.double_quoted_string,
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$.unquoted_string,
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)),
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)),
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),
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onbuild_instruction: $ => seq(
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alias(/[oO][nN][bB][uU][iI][lL][dD]/, "ONBUILD"),
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$._non_newline_whitespace,
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$._instruction,
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),
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stopsignal_instruction: $ => seq(
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alias(/[sS][tT][oO][pP][sS][iI][gG][nN][aA][lL]/, "STOPSIGNAL"),
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$._non_newline_whitespace,
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$._stopsignal_value,
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),
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_stopsignal_value: $ => repeat1(choice(
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/[A-Z0-9]+/,
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$.expansion,
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)),
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healthcheck_instruction: $ => seq(
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alias(/[hH][eE][aA][lL][tT][hH][cC][hH][eE][cC][kK]/, "HEALTHCHECK"),
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$._non_newline_whitespace,
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choice(
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"NONE",
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seq(
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repeat($.param),
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$.cmd_instruction,
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),
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),
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),
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shell_instruction: $ => seq(
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alias(/[sS][hH][eE][lL][lL]/, "SHELL"),
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$._non_newline_whitespace,
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$.string_array,
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),
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maintainer_instruction: $ => seq(
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alias(/[mM][aA][iI][nN][tT][aA][iI][nN][eE][rR]/, "MAINTAINER"),
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/.*/,
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),
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path: $ => seq(
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choice(
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/[^-\s]/, // cannot start with a '-' to avoid conflicts with params
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$.expansion,
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),
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repeat(choice(
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token.immediate(/[^\s\$]+/),
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$.expansion,
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)),
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),
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expansion: $ => seq(
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token.immediate('$'),
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choice(
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$.variable,
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seq('{', alias(/[^\}]+/, $.variable), '}'),
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)
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),
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variable: $ => token.immediate(/[a-zA-Z][a-zA-Z0-9_]*/),
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env_pair: $ => seq(
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field("name", alias(/[a-zA-Z][a-zA-Z0-9_]+[a-zA-Z0-9]/, $.unquoted_string)),
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token.immediate("="),
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field("value", choice(
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$.double_quoted_string,
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$.unquoted_string,
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)),
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),
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_spaced_env_pair: $ => seq(
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field("name", alias(/[a-zA-Z][a-zA-Z0-9_]+[a-zA-Z0-9]/, $.unquoted_string)),
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token.immediate(/\s+/),
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field("value", choice(
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$.double_quoted_string,
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$.unquoted_string,
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)),
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),
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expose_port: $ => choice(
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seq(
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/\d+/,
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optional(choice(
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"/tcp",
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"/udp",
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)),
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),
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$.expansion,
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),
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label_pair: $ => seq(
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field("key", alias(/[-a-zA-Z0-9\._]+/, $.unquoted_string)),
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token.immediate("="),
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field("value", choice(
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$.double_quoted_string,
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$.unquoted_string,
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)),
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),
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image_spec: $ => seq(
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field("name", $.image_name),
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seq(
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field("tag", optional($.image_tag)),
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field("digest", optional($.image_digest)),
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),
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),
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image_name: $ => repeat1(choice(
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token.immediate(/[^@:\s\$]+/),
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$.expansion,
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)),
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image_tag: $ => seq(
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token.immediate(":"),
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repeat1(choice(
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token.immediate(/[^@\s\$]+/),
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$.expansion,
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))
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),
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image_digest: $ => seq(
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token.immediate("@"),
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repeat1(choice(
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token.immediate(/[a-zA-Z0-9:]+/),
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$.expansion,
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)),
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),
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param: $ => seq(
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"--",
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field("name", token.immediate(/[a-z][-a-z]*/)),
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token.immediate("="),
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field("value", token.immediate(/[^\s]+/)),
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),
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image_alias: $ => repeat1(choice(
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/[-a-zA-Z0-9_]+/,
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$.expansion,
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)),
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string_array: $ => seq(
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"[",
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optional(seq(
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$.double_quoted_string,
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repeat(seq(",", $.double_quoted_string)),
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)),
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"]",
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),
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shell_command: $ => seq(
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$.shell_fragment,
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repeat(seq(
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$.line_continuation,
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repeat($._comment_line),
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$.shell_fragment,
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)),
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),
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shell_fragment: $ => repeat1(choice(
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/[^\\\[\n#\s][^\\\[\n]*/,
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/\\[^\n]/,
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)),
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line_continuation: $ => '\\\n',
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_comment_line: $ => seq(
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alias($._anon_comment, $.comment), '\n'
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),
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_anon_comment: $ => seq('#', /.*/),
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double_quoted_string: $ => seq(
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'"',
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repeat(choice(
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token.immediate(prec(1, /[^"\n\\\$]+/)),
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$.escape_sequence,
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$.expansion,
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)),
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'"'
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),
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unquoted_string: $ => repeat1(choice(
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token.immediate(/[^\s\n\"\\\$]+/),
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token.immediate("\\ "),
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$.expansion,
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)),
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escape_sequence: $ => token.immediate(seq(
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'\\',
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choice(
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/[^xuU]/,
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/\d{2,3}/,
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/x[0-9a-fA-F]{2,}/,
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/u[0-9a-fA-F]{4}/,
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/U[0-9a-fA-F]{8}/
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)
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)),
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_non_newline_whitespace: $ => /[\t ]+/,
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comment: $ => seq("#", /.*/),
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}
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});
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